Since the OP was asking about an alphabetic sort, I have to wonder about the inclusion of the u switch, which, from the help file, is used for a numeric sort.
Also, based on the code the OP presented, it looks like each game is written to a different line in the text file, making the t switch irrelevant, since the sort would be on the full game name, not just the first word of the name.
As I said in my post, I haven't used /filter much, so if I'm mistaken, I would appreciate clarification.
